Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Prostheses with Sensory Feedback

06.02.2014
Freiburg researchers have developed electrodes that help amputees to grasp at objects

The patient Dennis Aabo Sorensen grasps at a mandarin orange with his artificial hand. Source: LifeHand2 Project


The patient Dennis Aabo Sorensen grasps at a mandarin orange with his artificial hand. Source: LifeHand2 Project

An artificial limb that enables amputees to grasp at an object and feel it as though they were using their real hand: Thanks to Freiburg microsystems engineer Prof. Dr. Thomas Stieglitz and the international research group participating in the project LifeHand2, this has now become a reality. The scientists present the findings of their project in the journal Science Translational Medicine.

Surgeons implanted two ultra-thin electrodes each directly into the ulnar and median nerves in the upper arm of Dennis Aabo Sørensen, a patient with an amputated lower arm. The electrodes send sensory data by means of electrical impulses from the patient’s artificial hand directly to his brain over the peripheral nervous system. They give him information about the shape and consistency of the objects he grasps at – even when he cannot see them.

The patient learned to control his artificial hand with only little prior training and more quickly than the scientists had thought possible. He managed to sense objects like a plastic cup, a mandarin orange, and a heavy block of wood while being blindfolded and to take hold of them with a precise grip and the right amount of force. The combination of technology and the patient’s biological system worked almost intuitively.

The electrodes were developed in Thomas Stieglitz’ laboratory, professor of Biomedical Microtechnology at the Department of Microsystems Engineering of the University of Freiburg. “Our research helps patients who have lost a limb to move their prostheses in a completely natural way. It is always a very special moment for me as an engineer to see technological developments be implemented successfully on a patient after many years in the lab,” said the researcher. As this was only an initial test, the electrodes will have to be removed after 30 days as per the European directive on medical devices. The team plans to conduct further studies on patients in Rome, Italy; Lausanne, Switzerland; and Aalborg, Denmark.

Six research institutions in Italy, Switzerland, and Germany are participating in the project LifeHand 2. Launched in 2008, the project originated from the European Union–funded project TIME and the Italian project NEMESIS. The clinical director of the study is Prof. Dr. Paolo Maria Rossini, and the operation was performed by Prof. Dr. Eduardo Marcos Fernandez. Both are from the Agostino Gemelli University Polyclinic in Rome. The project director is Prof. Dr. Silvestro Micera from the Swiss Federal Institute of Technology in Lausanne.


Original publication
S. Raspopovic, M. Capogrosso, F. M. Petrini, M. Bonizzato, J. Rigosa, G. D. Pino, J. Carpaneto, M. Controzzi, T. Boretius, E. Fernandez, G. Granata, C. M. Oddo, L. Citi, A. L. Ciancio, C. Cipriani, M. C. Carrozza, W. Jensen, E. Guglielmelli, T. Stieglitz, P. M. Rossini, S. Micera, Restoring Natural Sensory Feedback in Real-Time Bidirectional Hand Prostheses. Sci. Transl. Med. 6, 222ra19 (2014). http://stm.sciencemag.org/content/6/222/222ra19
Further information on Surprising Science:
www.pr.uni-freiburg.de/go/lifehand2
Film and photo material available on request.
Contact:
Prof. Dr. Thomas Stieglitz
Laboratory for Biomedical Microtechnology
Department of Microsystems Engineering (IMTEK)
Phone: +49 (0)761 / 203-7471
E-Mail: thomas.stieglitz@imtek.uni-freiburg.de
Natascha Thoma-Widmann
PR/Marketing Coordinator
Faculty of Engineering
University of Freiburg
Phone: +49 (0)761 / 203-8056
Mobile: +49 (0)171 / 7616720
E-Mail: thoma-widmann@tf.uni-freiburg.de

Prof. Dr. Thomas Stieglitz | University of Freiburg
Further information:
http://www.uni-freiburg.de
http://www.pr.uni-freiburg.de/go/lifehand2

More articles from Information Technology:

nachricht Researchers build transistor-like gate for quantum information processing -- with qudits
17.07.2019 | Purdue University

nachricht New DFG Research Group "Metrology for THz Communications"
17.07.2019 | Technische Universität Braunschweig

All articles from Information Technology >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: First-ever visualizations of electrical gating effects on electronic structure

Scientists have visualised the electronic structure in a microelectronic device for the first time, opening up opportunities for finely-tuned high performance electronic devices.

Physicists from the University of Warwick and the University of Washington have developed a technique to measure the energy and momentum of electrons in...

Im Focus: Megakaryocytes act as „bouncers“ restraining cell migration in the bone marrow

Scientists at the University Würzburg and University Hospital of Würzburg found that megakaryocytes act as “bouncers” and thus modulate bone marrow niche properties and cell migration dynamics. The study was published in July in the Journal “Haematologica”.

Hematopoiesis is the process of forming blood cells, which occurs predominantly in the bone marrow. The bone marrow produces all types of blood cells: red...

Im Focus: Artificial neural network resolves puzzles from condensed matter physics: Which is the perfect quantum theory?

For some phenomena in quantum many-body physics several competing theories exist. But which of them describes a quantum phenomenon best? A team of researchers from the Technical University of Munich (TUM) and Harvard University in the United States has now successfully deployed artificial neural networks for image analysis of quantum systems.

Is that a dog or a cat? Such a classification is a prime example of machine learning: artificial neural networks can be trained to analyze images by looking...

Im Focus: Extremely hard yet metallically conductive: Bayreuth researchers develop novel material with high-tech prospects

An international research group led by scientists from the University of Bayreuth has produced a previously unknown material: Rhenium nitride pernitride. Thanks to combining properties that were previously considered incompatible, it looks set to become highly attractive for technological applications. Indeed, it is a super-hard metallic conductor that can withstand extremely high pressures like a diamond. A process now developed in Bayreuth opens up the possibility of producing rhenium nitride pernitride and other technologically interesting materials in sufficiently large quantity for their properties characterisation. The new findings are presented in "Nature Communications".

The possibility of finding a compound that was metallically conductive, super-hard, and ultra-incompressible was long considered unlikely in science. It was...

Im Focus: Modelling leads to the optimum size for platinum fuel cell catalysts: Activity of fuel cell catalysts doubled

An interdisciplinary research team at the Technical University of Munich (TUM) has built platinum nanoparticles for catalysis in fuel cells: The new size-optimized catalysts are twice as good as the best process commercially available today.

Fuel cells may well replace batteries as the power source for electric cars. They consume hydrogen, a gas which could be produced for example using surplus...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

2nd International Conference on UV LED Technologies & Applications – ICULTA 2020 | Call for Abstracts

24.06.2019 | Event News

SEMANTiCS 2019 brings together industry leaders and data scientists in Karlsruhe

29.04.2019 | Event News

Revered mathematicians and computer scientists converge with 200 young researchers in Heidelberg!

17.04.2019 | Event News

 
Latest News

Genetic differences between strains of Epstein-Barr virus can alter its activity

18.07.2019 | Health and Medicine

Algae-killing viruses spur nutrient recycling in oceans

18.07.2019 | Life Sciences

Machine learning platform guides pancreatic cyst management in patients

18.07.2019 | Health and Medicine

VideoLinks
Science & Research
Overview of more VideoLinks >>>